Unable to join world: java.lang.IllegalStateException: End size 1138 is less than fixed size 1139

[ZZZank]

Modpack Version

1.17.0

Describe your issue.

when trying to join a world, the progress will go to 100%, but then an error will be thrown:

(copied from latest.log)

java.lang.IllegalStateException: End size 1138 is less than fixed size 1139
	at java.base/java.util.stream.Nodes$FixedNodeBuilder.end(Nodes.java:1241) ~[?:?]
	at java.base/java.util.stream.Sink$ChainedReference.end(Sink.java:261) ~[?:?]
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:510) ~[?:?]
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?]
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:575) ~[?:?]
	at java.base/java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260) ~[?:?]
	at java.base/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:616) ~[?:?]
	at java.base/java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:622) ~[?:?]
	at java.base/java.util.stream.ReferencePipeline.toList(ReferencePipeline.java:627) ~[?:?]
	at TRANSFORMER/neoforge@21.1.95/net.neoforged.neoforge.network.registration.NetworkRegistry.initializeNeoForgeConnection(NetworkRegistry.java:360) ~[neoforge-21.1.95-universal.jar%23449!/:?]
	at TRANSFORMER/minecraft@1.21.1/net.minecraft.server.network.ServerConfigurationPacketListenerImpl.handleCustomPayload(ServerConfigurationPacketListenerImpl.java:118) ~[client-1.21.1-20240808.144430-srg.jar%23448!/:?]
	at TRANSFORMER/minecraft@1.21.1/net.minecraft.network.protocol.common.ServerboundCustomPayloadPacket.handle(ServerboundCustomPayloadPacket.java:40) ~[client-1.21.1-20240808.144430-srg.jar%23448!/:?]
	at TRANSFORMER/minecraft@1.21.1/net.minecraft.network.protocol.common.ServerboundCustomPayloadPacket.handle(ServerboundCustomPayloadPacket.java:15) ~[client-1.21.1-20240808.144430-srg.jar%23448!/:?]
	at TRANSFORMER/minecraft@1.21.1/net.minecraft.network.Connection.genericsFtw(Connection.java:207) ~[client-1.21.1-20240808.144430-srg.jar%23448!/:?]
...

There's no crash, but I will be sent back to Server Select screen. Looks like a "integrated server unable to start" problem

Crash Report

No response

Latest Log

https://gist.github.com/ZZZank/e029fb578fbe9c54984986983e174af1

Have you modified the modpack?

Yes

User Modifications

removed 3 mods:

• journey map
• journey map integration
• iris

Did the issue happen in singleplayer or on a server?

Singleplayer

Discord Username

No response

[NielsPilgaard]

Thanks for the report.

I take it this is a recurring issue, it happens every time you try joining the world?
Does it happen in new worlds?

[ZZZank]

it happens every time you try joining the world?

Yes, I've tried joining the same world, and creating two new worlds and try to join, both of which will fail

Does it happen in new worlds?

This issue has occurred since the very first time I open the game, so I'm not sure about if it will happen on existed worlds, but yes, it happens in newly created worlds

[ZZZank]

Update: I updated ModernFix to 5.20.2, other mods are left as is, and somehow I can join my worlds now

[Kevin-Marsh]

This is a recurring issue that is intermittent on world load. Restarting your game when it occurs will usually fix it. Restarting your world to update modernfix may have fixed it until it comes back in the future. If it comes back just restart until the issue goes away. It usually happens to me every second game restart.